Abstract: The present disclosure relates to a genetically modified host cell having increased production of one or more vitamin B compounds, wherein the host cell is genetically modified by mutating one or more native polynucleotide constructs for reducing formation of a CRP-cAMP complex in the host cell and/or introducing one or more genetic alterations increasing the degradation and/or non-CRP binding of cAMP in the host cell; whereby the production of the vitamin B compound in the genetically modified host cell is increased compared to a parent host cell.

Abstract: The invention provides a genetically modified bacterial cell capable of improved iron-sulfur cluster delivery, characterized by a modified gene encoding a mutant Iron Sulfur Cluster Regulator (IscR) as well as one or more transgenes encoding polypeptides that enhance the biosynthesis of either biotin, lipoic acid or thiamine. The invention provides a method for producing either biotin, lipoic acid or thiamine using the genetically modified bacterium of the invention; as well as for the use of the genetically modified bacterial cell for either biotin, lipoic acid or thiamine production.

Abstract: The invention provides a genetically modified bacterial cell capable of improved iron-sulfur cluster delivery, characterized by a modified gene encoding a mutant Iron Sulfur Cluster Regulator (IscR) as well as one or more transgenes encoding polypeptides that enhance the biosynthesis of either biotin, lipoic acid or thiamine. The invention provides a method for producing either biotin, lipoic acid or thiamine using the genetically modified bacterium of the invention; as well as for the use of the genetically modified bacterial cell for either biotin, lipoic acid or thiamine production.

Abstract: The invention relates to a genetically modified prokaryotic cell capable of improved iron-sulfur cluster delivery, characterized by a modified gene encoding a mutant Iron Sulfur Cluster Regulator (IscR) and one or more transgenes or upregulated endogenous genes encoding iron-sulfur (Fe—S) cluster polypeptides or proteins that catalyze complex radical-mediated molecular rearrangements, electron transfer, radical or non-redox reactions, sulfur donation or perform regulatory functions. The prokaryotic cells are characterized by enhanced activity of these iron-sulfur (Fe—S) cluster polypeptides, enhancing their respective functional capacity, and facilitating enhanced yields of compounds in free and protein-bound forms, including heme, hemoproteins, tetrapyrroles, B vitamins, amino acids, ?-aminolevulinic acid, biofuels, isoprenoids, pyrroloquinoline quinone, ammonia, indigo, or their precursors, whose biosynthesis depends on their activity.